| 摘要 |
PROBLEM TO BE SOLVED: To prevent the clogging of an immersion nozzle and the entrapment of mold flux and to improve the stabilization of an operation and the quality of a cast slab by arranging the immersion nozzle so that discharging holes of the immersion nozzle are mutually faced and the discharge flows are mutually faced and do not collide heat-on each other. SOLUTION: Molten metal is supplied into a mold by using two pieces of a first and a second immersion nozzles 1a, 1b having the discharging hole in one direction on side surface to produce the cast slab. The first immersion nozzle 1a and the second immersion nozzle 1b are arranged on the center line Y-Y in the mold thickness in parallel with the mold long sides. The first and the second immersion nozzles 1a, 1b are arranged so that the discharging holes 2a, 2b of both immersion nozzles 1a, 1b and the discharge flows 3a, 3b of molten steel become the parallel faced flows. The spouting anglesθa ,θb formed between the discharge flows 3a, 3b and the center line Y-Y are set to 2-10 deg..
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